At: derive trans 1 1 2 1 2 3 3 1
1. V: Type
2. T: Type
3. G: Grammar(V;T)
4. l: (V+T)*
5. m: (V+T)*
6. n: (V+T)*
7. a1: ((V+T)*)*
8. ||a1|| > 0
9. l = a1[0]
10. 
i:
(||a1||-1). a1[i] 
a1[(i+1)]
11. a1[(||a1||-1)] = m
12. a: ((V+T)*)*
13. ||a|| > 0
14. m = a[0]
15. i:(||a||-1). a[i] a[(i+1)]
16. a[(||a||-1)] = n
17. 
||a1|| > 1
18. ||a1|| = 1
l = a[(0-(||a1||-1))]
By: RWH (HypC 18) 0
Generated subgoal:| 1 | l = a[(0-(1-1))] |
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